A unit of exposure to x-rays or gamma rays. One roentgen is the amount of gamma or x-rays needed to produce ions carrying 1 electrostatic unit of electrical charge in 1 cubic ...
Medical imaging method employing tomography where digital geometry processing is used to generate a three-dimensional image of the internals of an object from a large series of ...
A block of radiation attenuating material with one or more fixed or movable apertures. The collimators in the treatment head of the Clinac define the treatment field and limit the ...
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